DINKONDA GLOBAL Power Plants Special Directly Buried Thermal Pipeline, DN50‑DN1200 Directly Buried External Pressure Corrugated Compensator Metal Expansion Joint

DINKONDA GLOBAL Power Plants Special Directly Buried Thermal Pipeline, DN50‑DN1200 Directly Buried External Pressure Corrugated Compensator Metal Expansion Joint

Product Overview
Directly buried external pressure metal bellows compensator, also known as direct buried external pressure expansion joint, is specially used for directly buried laying of thermal pipelines, compensating for axial displacement of pipeline thermal elongation. The bellows bear external pressure, and the medium flows through the internal guide tube. The bellows do not contact the conveying medium, effectively avoiding corrosion of the bellows medium. It can be directly buried underground without the need for a dedicated compensation well and is widely used in urban centralized heating, direct buried steam and hot water pipelines. The typical specification in the figure is DN250.

Structural Composition
1. Stainless steel bellows: The core elastic element is made of 304/316L stainless steel. The bellows can withstand external pressure, achieve axial expansion compensation, and have excellent fatigue resistance.

2. Internal and external guide tubes: isolate the medium from the corrugated pipe, prevent the medium from scouring the ripples, ensure smooth flow of the medium, and mark the flow direction arrow of the medium.

3. Outer casing (outer shell cylinder): Made of Q235 carbon steel, it can withstand soil pressure and external loads, protect the corrugated pipe from being squeezed and bumped by soil and sand, and apply anti-corrosion coating on the outer wall.
Limit rod component: composed of a rod, nut, and pressure plate, pre stretched at the factory, can limit the maximum compensation amount of the product, prevent the bellows from exceeding displacement and damage, and withstand pressure thrust during the pressure testing stage.

4. Two end connection: welded and connected to the thermal pipeline, made of carbon steel material, suitable for direct buried pipeline welding construction.

5. Anti corrosion coating: epoxy anti-corrosion coating on the outer wall of the shell, suitable for underground anti-corrosion conditions.

Product Features
1. External pressure structure design: The outer side of the corrugated tube is pressurized, and the medium flows through the inside of the guide tube. The corrugated tube does not come into contact with the medium, reducing the risk of medium corrosion and ensuring a long service life.

2. Suitable for direct buried underground laying, no need to build compensation wells, reducing civil construction costs and simplifying pipeline engineering.

3. Only absorbs axial displacement and cannot withstand lateral or angular displacement; Pipe network design requires supporting fixed supports and sliding supports.

4. Limit rod protection can control the maximum compensation stroke to prevent excessive stretching and compression failure of the corrugated pipe, and bear the pressure thrust during the compression test.

5. The shell has good resistance to soil compression and groundwater corrosion, and the anti-corrosion process is suitable for complex underground soil environments.

6. Complete specifications, customizable: DN50-DN1200, pressure PN0.6-PN2.5, suitable for direct burial of hot water and saturated steam pipelines.

FAQ:
Q1.What about the lead time?
A: 5-7 days for Sample preparing ,15-20 working days for mass production.

Q2. Is it OK to print my logo on led light product?
A: Yes. Please inform us formally before our production.

Q3: Do you offer guarantee for the products?
A: Yes, we offer 1 years warranty to our products.

Q4: How to deal with the faulty?
A: Firstly, Our products are produced in strict quality control system and the defective rate will be less than 0.2%.

Secondly, during the guarantee period, we will send new lights with new order for small quantity. For defective batch products, we will repair them and resend them to you or we can discuss the solution including re-call according to real situation.

Company Profile

DINKONDA GLOBAL has been developing and supplying equipment and components for specialized thermal power plants and related industries for 20 years and is one of the a market-leading global manufacturers and providers in the industry. We have a professional technical research and development team, professional management talents and dozens of quality inspection personnel. The company has more than 50 CNC machining centers, CNC lathes, various inspection equipment and other professional equipments.
Our comprehensive product portfolio and over 20 years of industry knowledge mean customers can rely on us to deliver innovative, reliable and economic products. Chenglei products are designed and manufactured with quality components and clear user interfaces for quick and safe operation in the field. Our strict product development and testing ensures long-lasting performance and continued reliability. Our independently developed and produced CL series valve electric actuators are widely used in various industries such as Oil & Gas, Water & Power, and Chemical, Process & Industrial .
Customers rely on us for innovative, high quality and dependable products for managing the flow of liquids, gases and powders. We help customers around the world to reduce emissions, improve efficiency, minimize their environmental impact and assure safety.